The singer emphasized that while 2018 was a great year for her professionally, personally it wasn't such a high note. But all the heartbreak could turn into a big pay out for the star.

Photo credit: Getty

Photo credit: Getty

An insider tells OK!, "She's been approached about writing a memoir and she's seriously considering it."

Photo credit: Getty

Photo credit: Getty

“Ariana’s been through so much over the past couple of years and has a lot to say. People were fascinated by her talking about her exes in ‘Thank U, Next,’ and she sees there’s a huge demand for her to spill the beans even more," the source continued.

Photo credit: INSTARImages

Photo credit: INSTARImages

The insider revealed it "could turn into a billion dollar career move" for the star.

Photo credit: INSTARImages

Photo credit: INSTARImages

For more on Ariana's book, pick up the latest issue of OK!, on newsstands tomorrow.